Bushings & Dampers TPU Compound | High Load-Bearing, Abrasion-Resistant
Bushings & Dampers TPU Compound
TPU compounds designed for automotive suspension bushings, damping elements, and vibration isolation parts,
where performance depends on energy absorption, controlled rebound, low compression set, and long-term shape stability.
This page focuses on how to position TPU materials for NVH (noise, vibration, comfort) behavior, fatigue durability, and injection molding dimensional control.
For bushings and dampers, the “best” material is not only high strength. It is a balance between
resilience (returning energy), damping (absorbing energy), and compression set control (holding shape under load).
This balance directly affects NVH feel, ride stability, and service life.
resilience (returning energy), damping (absorbing energy), and compression set control (holding shape under load).
This balance directly affects NVH feel, ride stability, and service life.
Energy Absorption
Rebound Control
Low Compression Set
Fatigue Durability
NVH Performance
Injection Dimensional Stability
Rebound Control
Low Compression Set
Fatigue Durability
NVH Performance
Injection Dimensional Stability
Typical Applications
- Suspension bushings: control arms, stabilizer components, subframe interfaces (project-dependent)
- Damping elements: rebound stops, buffer blocks, elastic support parts where deformation is frequent
- Vibration isolators: mounts or isolation structures where comfort and noise control are important
- Wear / contact elastomer parts: where friction, fatigue, and deformation stability must be balanced
Quick Grade Selection (Shortlist)
Choose “Comfort NVH” when
- Vibration isolation and ride comfort are the main targets
- You want smoother response and reduced harshness
- Moderate load and deformation range with stable rebound behavior
Choose “Load & Stability” when
- Compression set control is critical under long-term static load
- Shape retention and dimensional stability drive service life
- Higher deformation stress and stronger rebound control needed
Note: Final positioning depends on load profile (static vs dynamic), target stiffness response, temperature range, and NVH tuning requirements.
NVH Performance: What Matters in Practice
NVH is not a single number. In elastomer parts, NVH behavior comes from how the material reacts under different amplitudes and frequencies:
- Low-amplitude vibration isolation: reduces transmitted vibration and improves comfort
- Mid/high-amplitude energy absorption: controls harshness and impact feel
- Rebound behavior: affects “bouncy” feeling and stability after compression events
- Long-term shape stability: prevents drift in stiffness and NVH response after aging
If your NVH targets are strict, provide your test method or target curve (project-dependent). We can align grade positioning around your comfort vs stability preference.
Common Failure Modes (Cause → Fix)
Use the diagnostic table below to reduce trial loops and identify which property balance needs adjustment:
| Failure Mode | Most Common Cause | Recommended Fix |
|---|---|---|
| Permanent deformation / sag after long load | Compression set too high; formulation balance favors rebound but loses shape retention | Move to lower compression set positioning; validate compression set and dimensional drift after aging |
| “Too bouncy” rebound feel | Resilience too high for comfort target; insufficient energy absorption in dynamic response | Adjust rebound/damping balance; select comfort-NVH positioning; confirm on part-level dynamic tests |
| Harsh impact / poor isolation | System too stiff at small amplitude or not tuned for vibration range | Switch to softer or isolation-focused family; provide load-deflection window for matching |
| Cracking under cyclic deformation | Fatigue margin insufficient; stress concentration at geometry transition or bonding zones | Increase fatigue-resistant positioning; improve geometry transitions; validate fatigue and tear on molded parts |
| Dimension drift / warpage after molding | Cooling and shrinkage not stable; moisture or processing window too narrow | Dry thoroughly; stabilize melt temperature and cooling; optimize gate/packing; consider shrinkage control package |
Typical Grades & Positioning
| Grade Family | Hardness | Design Focus | Typical Use |
|---|---|---|---|
| TPU-AUTO BSH Comfort NVH | 80A–95A | Energy absorption + smooth rebound for comfort-oriented NVH feel (project-dependent) | Vibration isolation parts and comfort-positioned bushings where harshness reduction matters |
| TPU-AUTO BSH Load & Stability | 90A–65D | Compression set control + long-term deformation stability under load | Load-bearing bushings and damper elements requiring stable dimensions and consistent response over time |
Note: Exact hardness and package choice should be confirmed by load profile, target stiffness response, and dimensional tolerance needs.
Injection Molding & Dimensional Stability
1) Dry
Moisture impacts viscosity stability, surface integrity, and shrink control. Dry thoroughly to reduce warpage and dimension drift.
2) Stabilize Fill & Pack
Stable filling and packing reduce internal stress and improve size repeatability. Gate design and venting are critical for thick-to-thin transitions.
3) Control Cooling
Cooling consistency drives shrink uniformity. Consistent mold temperature and cooling time help prevent warpage and dimensional scatter.
- Dimensional repeatability: Provide your tolerance window and critical dimensions; we can prioritize shrink control positioning (project-dependent).
- Long-term stability: Confirm compression set and stiffness drift after aging under your typical load and temperature.
- NVH tuning: If you have a target response curve or test method, share it to reduce selection loops.
Request Samples / TDS
For bushings and dampers, the fastest route is to match your load-deflection window and long-term deformation requirement, then confirm NVH feel through your test method.
Contact us to receive a recommended shortlist and technical data sheets for trials.
To get a fast recommendation, send:
- Part type (bushing / damper / isolator), geometry highlights, and critical dimensions
- Load profile: static load, deformation range, and cycle expectation (if known)
- Target comfort vs stability preference (NVH feel) and test method (project-dependent)
- Temperature range and any aging constraints
- Injection molding constraints: tolerance window, appearance, cycle time
